If Mythos has an Easter menu, it will no doubt be the best value at Universal Orlando.
If you're looking for something "special" (i.e. if you're willing to pay big bucks), here are some thoughts:
Islands Dining Room at Royal Pacific. Excellent cuisine, with a Pacific/Asia flavor.
Delfino Riviera at Portofino Bay Hotel. Very elegant Italian palazzo atmosphere. A great choice for a romantic dinner.
Then, of course, there are the two Emeril's restaurants: the original in CityWalk and the new Tchoup Chop at RPR (not open yet). Reserve extra early for these.